Power Sound Audio 15V vs REL T-9X
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Choosing between the Power Sound Audio 15V and REL T-9X? Both compete in the Subwoofer segment. Here’s how they compare across the specs that matter most for your home theater.
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Looking at overall performance dimensions: The Power Sound Audio 15V scores higher in value, audio quality, volume/SPL. The REL T-9X leads in form factor, room fit.
Key subwoofer differences include driver sizes of 15" vs 10", and the Power Sound Audio 15V digs deeper at 18 Hz (-3dB) vs 32 Hz. Larger drivers move more air, producing deeper bass with less effort. A 15-inch driver reaches lower than a 10-inch at the same power, but the cabinet is proportionally larger. A lower number means deeper bass — the rumble in explosions, the weight of a pipe organ. Below 20 Hz you feel it more than hear it.
These two Subwoofer options trade wins across different dimensions. The right choice depends on which specs matter most for your room and listening preferences — review the detailed table below to decide.
For most home theaters, the Power Sound Audio 15V is the stronger choice — it leads in 3 of 5 scored dimensions. The REL T-9X makes more sense if you prioritize the 2 dimensions where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
Power Sound Audio 15V
REL T-9X
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Driver Size | 15" | 10" |
| RMS Watts | 725W | 300W |
| -3dB Extension | 18Hz | 32Hz |
| -6dB Extension | — | 27Hz |
| Phase Control | No | No |
| LFE Input | No | Yes |
| Line Input | Yes | Yes |
| XLR Input | No | No |
| App Control | No | No |
| Passive | No | No |
| Enclosure | bass-reflex | — |
Key Differences
- Enclosure: Power Sound Audio 15V at bass-reflex vs REL T-9X at —. Sealed subs are tighter and more accurate, better for music. Ported subs play louder and dig deeper for the same driver/amp, better for movies. Some subs offer both via a removable port plug.
- RMS Watts: Power Sound Audio 15V at 725W vs REL T-9X at 300W. More sustained power means the sub maintains authority at high volumes without compression. RMS matters more than peak — it's the power available all the time, not just in bursts.
- -3dB Extension: Power Sound Audio 15V at 18Hz vs REL T-9X at 32Hz. A lower number means deeper bass — the rumble in explosions, the weight of a pipe organ. Below 20 Hz you feel it more than hear it.
- Driver Size: Power Sound Audio 15V at 15" vs REL T-9X at 10". Larger drivers move more air, producing deeper bass with less effort. A 15-inch driver reaches lower than a 10-inch at the same power, but the cabinet is proportionally larger.
- -6dB Extension: Power Sound Audio 15V at — vs REL T-9X at 27Hz
Which Should You Choose?
Choose Power Sound Audio 15V if you want:
- + larger 15" driver
- + better rms watts — more sustained power means the sub maintains authority at high volumes without compression
- + better -3db extension — a lower number means deeper bass — the rumble in explosions, the weight of a pipe organ
See Where These Rank
Check our editorial rankings to see how Power Sound Audio 15V and REL T-9X compare to the rest of the field.
Best Subwoofer RankingsRelated Calculators
Specifications sourced from manufacturer datasheets and verified against retailer listings. Prices updated hourly from authorized retailers. Scoring uses our open methodology — products are never ranked, promoted, or suppressed based on affiliate commission rates.
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